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Empire Comfort Systems VFDR30LBN-1 用户手册

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Page 6
23099-1-0707
PRODUCT SPECIFICATIONS
Water vapor is a by-product of gas combustion. An unvented room 
heater produces approximately one (1) ounce (30ml) of water for 
every 1,000 BTU's (.3KW's) of gas input per hour. 
Unvented room heaters must be used as supplemental heat (a 
room) rather than a primary heat source (an entire house). In most 
supplemental heat applications, the water vapor does not create a 
problem. In most applications, the water vapor enhances the low 
humidity atmosphere experienced during cold weather. 
The  following  steps  will  help  insure  that  water  vapor  does  not 
become a problem.  
1.  Be sure the heater is sized properly for the application, including 
ample combustion air and circulation air.
2.  If high humidity is experienced, a dehumidifier may be used to 
help lower the water vapor content of the air.
3.  Do not use an unvented room heater as the primary heat source 
(an entire house).
WATER VAPOR: A BY-PRODUCT OF UNVENTED ROOM HEATERS
Model
Gas
Valve Type
Regulator Pressure 
Setting
Gas Inlet Pressure 
Max
Gas Inlet Pressure 
Minimum
VFDR(18,24,30)LB
Natural
Millivolt
3.5" W.C.
10.5" W.C.
4.5" W.C.
Propane
10.0" W.C.
13.0" W.C.
11.0" W.C.
VFDR18LB10
Natural
Millivolt
3.5" W.C.
10.5" W.C.
5.0" W.C.
Propane
10.0" W.C.
13.0" W.C.
11.0" W.C.
VFDT(18,24,30)LB
Natural
Thermostat
6.0" W.C.
10.5" W.C.
7.0" W.C.
Propane
10.0" W.C.
13.0" W.C.
11.0" W.C.
VFDM(18,24,30)LB
Natural
Manual
6.0" W.C.
10.5" W.C.
7.0" W.C.
Propane
10.0" W.C.
13.0" W.C.
11.0" W.C.
Model
BTU/hr. 
Max. Rate
BTU/hr.
Med. Rate
BTU/hr. 
Min. Rate
VFDR18LB10N
10,000
N/A
N/A
VFDR18LB10P
10,000
N/A
N/A
VFDR18LBN
28,000
N/A
19,000
VFDR18LBP
28,000
N/A
22,000
VFDR24LBN
34,000
N/A
24,000
VFDR24LBP
34,000
N/A
26,000
VFDR30LBN
40,000
N/A
27,000
VFDR30LBP
40,000
N/A
31,000
VFDT18LBN
28,000
N/A
19,000
VFDT18LBP
28,000
N/A
22,000
VFDT24LBN
34,000
N/A
24,000
VFDT24LBP
34,000
N/A
26,000
VFDT30LBN
40,000
N/A
27,000
VFDT30LBP
40,000
N/A
31,000
VFDM18LBN
28,000
23,000
19,000
VFDM18LBP
28,000
25,000
22,000
VFDM24LBN
34,000
29,000
24,000
VFDM24LBP
34,000
30,000
26,000
VFDM30LBN
40,000
32,000
27,000
VFDM30LBP
40,000
36,000
31,000